Pair 12 Inch Classic Beehive High Excursion Subwoofer Speaker Grills PAIR PACKED. Fits all 12" Standard Size Subwoofers. Classic "Beehive" Design. High Excursion Design Allows for Upward Movement of High Power Subwoofers. High Flex Weatherproof ABS Outer Rim with Reinforced Steel Grill Measures Exactly 12.75" Across. Bolt to Bolt Measurement is 8 1/4" Unique Design Features a 1 1/2" Rise and a 1/2" Dip in the Center.